Stenciling.



W. G. FUERTE.

STENGILING.

APPLIOATIONTILBD NOV. 15, 1913.

` Patented Feb. 17, 1914.

-Water or other suitable emollient.

TENT OFFICE.

WILLIAM G. FUERTE, F NEWARK, NEW JERSEY, ASSIGNOR T0 EQUILIBRATOR COMPANY, 0F NEWARK, NEW JERSEY, .A CORPORATION OF NEW JERSEY.`

STENCILING.

Specification of Letters Patent.

Patented Feb. 17, 1914o To all whom it may concern :Be :it known that I, WILLIAM G. FUERTH, a citizen of the United States, residing .in Newark, in .the county of Essex and State of New Jersey, have invented certain new and .useful Improvements in Stenciling, of

which the following is a specification.

4This invention relates to stencil sheets, such as are formed by coating Yoshino ipaper with glue or gummy substance which is .rendered impervious by means of an astringent or fixing agent. character are disclosed in the British patents to -De Zuccato, 12,136 of 1894, and 13,851 of 1893. In vmaking a stencil :from these sheets coated With-glue or gelatin, it is customary to soften the coating -by an application of In consequence, -the rolls and other portions of .the typewriter are apt to become gummy by reason ofcontact with the softened coating on the sheet. It is also -found in making such stencils that the lines cut by the types arefobjectionably fine, this being due to the fact that the types inthe 'typewriter are of ethe hair line variety, having sharp edges, which .make very thin indentations in .the =gum on 'the stencil sheet. Stencil sheets of .this character are dyed a dark color, and when writing :a stencil it is .provided with a light colored backing, so that Athe operator -.can tread the stencil as Work thereonpro# grasses-in the typewriting machine. v

One of the objects of the present' inven- .tion is to .avoid the diiiculty before mentioned, of gumming up of the typewriter 4rollsand parts by the moistened coating of the stencil sheet,.`and also Ato strengthen the 'characters which are formed or cut fin the stencil, so that 'mre legible and desirable inked copies may be made therefrom, andl :also rtoaccomplishthese ,results without sacriicing the advantage of having the char-v acters written on` the -stencil sheet legible as the writing thereon progresses in the writing machine. These objects are accom'- j plished by means of the device shown in :the: .accompanying drawing, in which A is the- 'backing sheet; B is a stencil sheet coated g with glue or other gummy substance which is rendered impermeable and which is also .moistened preparatory to cutting the stencil thereon in the typewriting machine.; and .C

-isa facingof oil tissue paper whichever-lies the vmoistened stencil sheet said-sheets being Sheets of this' 'dark color, and the -a light color so that the type impressions preferably attached together at their leading edges above the line D. The overlying sheet C doesnot become dampened from the water or emollient with which the stencil sheet B is treated, because said overlying sheet C is oiled to prevent it from absorbing moisture, and it serves to prevent either the rolls or any other part of the typewriter from vcontacting with the water or emollient or softened gum. Moreover, the sheet C' performs the function of enlarging the cuts made by the types in the stencil sheet B, so that the inked copies will more nearly resemble ordinary inked ribbon type impressions. In other words, this sheet C serves to make widerroriices or apertures in the gummy coating, through'which'oriiices the ink is transmitted in the subsequent printing process. The impact of the type face, is, by means ofthe intervention of the overlying sheet C, distributed over a somewhat larger area than such impact -would effect upon the unprotected sheet. Any given line of type coming in contact first, -with the overlying sheet C, carries such sheet with it -against the coated sheet and thus knocks oli' the coating through afrather broader line, In other words, the outside sheetdisltributes the effect of the blow somewhat. The effect is the same as if type, blunter on copies, but also avoids another ditliculty heretofore experienced, owing to the iineness -of the apertures in the stencil sheet, which is the liability vof the openings in the stencil being closed at many points byl reason of the ,pressure to which the stencil sheet is repeatedly sub] ected in the stenciling machine during lthe printing process. When the stencils `are made by the use of this sheetC, the

openings made are so Wide that there is no Vliability-y of their becoming closed. This is an important feature in this class of stencils which are sometimes capable of making manyathousands of copies, so that there is ample opportunity for a narrowly-cut sten- -kcil to be closed before the run of thousands of copies is completed.

The stencil sheet B is dyed, preferably a backing A is. preferably made on vthe stencil sheet may be legible to the operator as she lproceeds to make them in the :typewriting machine, and 4this legi- 85 the edgel than the usual sharp edged type, v Twere used. This not only makes better inked bility is preserved to a satisfactory extent when the overlying sheet C is employed, because such sheet C is transpicuous, the oil serving to increase this quality of the sheet C. The typewritten'words on the drawing indicate the stencil B partly madeor cut out, and are visiblethrough sheet C. lt will be understood, however, that many of the advantages of the invention may be gained without oiling the overlying sheet C.

i-s.ftei'inoistening the stencil sheet l5 with the emollient, the surplus moisture is blotted off, and the sheet C, either oiled or not, is laid down upon the sheet B, and the whole inserted in the typewriting machine. As is well known in operating typewriters, the work-sheet drags over the top edge of the usual paper shelf, and it has been found heretofore in using the dampened gluecoated stencil sheets in the typewriting machine, that said top edge of the paper shelf laccumulates gum from the stencil sheets, and as a result the work-sheetiS apt to adhere to the paper shelf in a manner to cause r the work-sheet to feed askew in passing between the feed rolls of the typewriter. Moreover, the little soft rubber feed rolls which usually press the work-sheet against the platen of the typewriter, by reason of repeatedly running"upon the softened glue of the stencil sheet, have been found to become coated or smeared with the glue composition, with very objectionable results,v

especially when using the machine in the ordinary way for inked type impressions after making a lot of stencils upon the machine. These disadvantages are all .overcome by the present invention, and moreover, the types donot take off any glue from the coated sheet, and by cooperation r with the cover sheet, make an important imthree sheets can befastened together in pi'ovement in the impressions in the stencil sheet, as already explained.

Another advantage flowing from my invention is in the attaching together of the sheet A, B and C. It will be seen in the drawings that a metal hammer or jaw E, which is heated, presses the three sheets upon an opposing anvil or jaw F. The heat of the jaw E softens the glue in the sheet B and therefore causes itv to unite firmly to the sheets A and C. The sheet C prevents the softened glue from sticking to the jaw E when the latter is raised. Thus the expense of attaching the sheets together is reduced to a negligible point. In fatt, plie tus manner at'such a low cost that the expense of producing the three-sheet structure may be the same as, or even less than, the expense of producing a structure consisting only ofthe sheets A and B, owing to the ditliculty of attaching A and B together at their top edges, the heated jaw hammer or vise not being available when the two-sheet form alluded to above is used, owing to .the difficulty that the glue would stick to the hammer or jaw E. Thus it will be seen that by this invention the cost of the ultimate structure is reduced, it contains more parts, and has the important advantages already explained. As to some of these features, however, the invention is not limited to three sheets secured together in the manner described.

lt will be seen that in connection with a membranous coated stencil sheet such as Yoshino paper having a glutinous or gelatin coating, the glutinous gelatin solution being usually glycerinated, so that the stencil sheet B is impervious and requires moisture to modify they same for stencil purposes, said sheet being preferably mounted on an impervious backing sheet A, l have provided a porous or tissue front sheet to insure certainty in cutting the stencil, and especially valuable in protecting the sheetfeeding devices of the typewriting mechanism from being smeared with moisture ooz- A ing from the stencil sheet, thereby preventing the gumming or clogging of the t-ypewriter carriage and the soiling of the worksheets used in ordinary correspondence and other typewriting, after the typewriting machine has been used for cutting a moist stencil. If desired, this cover sheet C may be retained upon the stencil sheet B duringthe printing process, although this is not necessary. If retained, it serves as a protector which receives much of the wear and tear of thestenciling machine and tends to prolong the life of the stencil itself. This sheet is thin and open enough in texture to permit the Iready passage of the ink. Moreover, at the places where it has been struck by the type its texture has been injured or broken down to such an extent as to render the passage of the ink still more easy.

It is very often desired to fill out a stencil according to a certain form or arrangement of columns and wording, and to facilitate this, the form may be printed on the cover sheet Cas indicated at G, such printing being, of course, done by means of an ordinary printing press.

Variations may be resorted to Within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:v l

`1. A 'collation of sheets for typewriter stencil purposes, comprising a coated stencil sheet adapted to be moistened preparatory to being .typewritten, and having a backing and covered with a moisture resistant tissue sheet to prevent the moisture from the dampened stencil from oozing out onto the parts of the typewriting'machine.

2. A collation of sheets for typewriter p sheet vwriting f of contrasting colors so that purposes, comprising a coated stencil adapted to be moistened preparatory to being typewritten, and having a backing and covered with a tissue sheet to prevent stencil vthe moisture from the dampened stencil from oozing out onto the parts of the typemachine, said tlssue sheet being oiled.

3. A collation of stencil purposes, havin an impervious coating which must be moistened preparatory to having a stencil typewritten thereon, a 'backing for said stencil, said backing and said stencil being Sheets for typewriter of contrasting colors so that the stencil may be legible as the writing thereof progresses, and a transpicuous overlying sheet through which the writing -on the stencil is still legible, to protect the typewriter parts from being smeared with molsture or gummy substance from the stencil, and to widen the apertures made in the st ncil, substantially as setforth.

4. A collation of sheets for typewriter stencil purposes, comprising a stencil sheet havin an impervious coating which must be moistened preparatory to having a stencil typewritten thereon, a backing for said stencil, said backing and said stencil being the stencil may be legible as the writing thereof 4pro esses, and a transpicuous overlying sheet t rough which the writing on the stencil is still legible, .to protect the typewriter parts from comprising a stencil sheetl gummy substencil, and to widen, the

being smeared with moisture or stance from the apertures made in the stencil, said overlying sheet being an oiled tissue sheet, substantially as set forth.

5. A' collation of sheets for typewriter stencil urposes, comprising a coated stencil sheet a apted to be moistened preparatory to being typewritten, and having a backing and coveredv with a tissue sheet to prevent the moisture from the dampened stencil from oozing out onto the parts of the typewriting machine, said-tissue sheet having a form printed thereon. s

6. A collation of sheets' for typewriterstencil purposes, comprising a stencil sheet having animpervious coatmg which must be molstened preparatory to havinga stencil typewritten thereon, a backing for said stencil,.said backing and said stencil being of contrasting colors so that the stencil may be ylegible as the writing thereof progresses, and a transpicuous overlying sheet through which i the writing .on the stencil is still legible, to protect the typewriter parts from being smeared with molsture or gummy substance from 'the stencil,l and to. widen the apertures made in the stencil, said over-v lying sheet being an oiled tissue sheet and having a form printed thereon.

WILLIAM G. FUERTH. Witnesses: A

J. F. RULE, 1 W. V. WEsTPHAn.

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